Technically doesn't all writing change lives?

At the very least it helps the writer reflect. 

Experiments going back to the 1980s have shown that "therapeutic" or "expressive" writing can reduce depression, increase productivity and even cut down on visits to the doctor.

"The act of writing is more powerful than people think," Peterson says.

Most people grapple at some time or another with free-floating anxiety that saps energy and increases stress. Through written reflection, you may realize that a certain unpleasant feeling ties back to, say, a difficult interaction with your mother. That type of insight, research has shown, can help locate, ground and ultimately resolve the emotion and the associated stress.

At the same time, "goal-setting theory" holds that writing down concrete, specific goals and strategies can help people overcome obstacles and achieve.

'It Turned My Life Around'

Recently, researchers have been getting more and more interested in the role that mental motivation plays in academic achievement — sometimes conceptualized as "grit" or "growth mindset" or "executive functioning."

Peterson wondered whether writing could be shown to affect student motivation. He created an undergraduate course called Maps of Meaning. In it, students complete a set of writing exercises that combine expressive writing with goal-setting.

Students reflect on important moments in their past, identify key personal motivations and create plans for the future, including specific goals and strategies to overcome obstacles. Peterson calls the two parts "past authoring" and "future authoring."

"It completely turned my life around," says Christine Brophy, who, as an undergraduate several years ago, was battling drug abuse and health problems and was on the verge of dropping out. After taking Peterson's course at the University of Toronto, she changed her major. Today she is a doctoral student and one of Peterson's main research assistants.